/Engine/Plugins/NetcodeUnitTest/NetcodeUnitTest/Source/NetcodeUnitTest/Classes/ClientUnitTest.h
Notification triggered BEFORE a replicated actor has been created (allowing you to block creation, based on class)
virtual void NotifyAllowNetActor ( [UClass](API\Runtime\CoreUObject\UObject\UClass) * ActorClass, bool bActorChannel, bool & bBlockActor )